Methods of Linking with Small Samples in a Common-Item Design: An Empirical Comparison. Research Report. ETS RR-09-38

Autor/inn/en	Kim, Sooyeon; Livingston, Samuel A.
Titel	Methods of Linking with Small Samples in a Common-Item Design: An Empirical Comparison. Research Report. ETS RR-09-38
Quelle	In: ETS Research Report Series, (2009), (56 Seiten)Infoseite zur Zeitschrift PDF als Volltext kostenfreie Datei Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	2330-8516
Schlagwörter	Sampling; Sample Size; Accuracy; Test Items; Equated Scores; Test Construction; Error of Measurement; Comparative Analysis; Ability; Scoring + Suchen Sie Ihr Suchwort? Test content; Testaufgabe; Testaufbau; Messfehler; Fähigkeit; Fertigkeit; Bewertung
Abstract	A series of resampling studies was conducted to compare the accuracy of equating in a common item design using four different methods: chained equipercentile equating of smoothed distributions, chained linear equating, chained mean equating, and the circle-arc method. Four operational test forms, each containing more than 100 items, were used for the equating, with new-form samples of 100, 50, 25, and 10 examinees and reference-form samples three times as large. Accuracy was assessed in terms of the root-mean-squared difference (over 1,000 replications) of the sample equatings from the criterion equating. Overall, chained mean equating produced the most accurate results for low scores, but the circle-arc method produced the most accurate results, particularly in the upper half of the score distribution. (As Provided).
Anmerkungen	Educational Testing Service. Rosedale Road, MS19-R Princeton, NJ 08541. Tel: 609-921-9000; Fax: 609-734-5410; e-mail: RDweb@ets.org; Web site: https://www.ets.org/research/policy_research_reports/ets
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01